import Vue from 'vue'
import VueRouter from 'vue-router'

// import Login from '../components/Login.vue'
const Login = () =>
  import(/* webpackChunkName: "login_home_welcome" */ '../components/Login.vue')
// import Home from '../components/Home.vue'
const Home = () =>
  import(/* webpackChunkName: "login_home_welcome" */ '../components/Home.vue')
// import Welcome from '../components/Welcome.vue'
const Welcome = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/Welcome.vue'
  )
// import Users from '../components/User.vue'
const Users = () =>
  import(/* webpackChunkName: "login_home_welcome" */ '../components/User.vue')
// import Rights from '../components/Rights.vue'
const Rights = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/Rights.vue'
  )
// import Roles from '../components/Roles.vue'
const Roles = () =>
  import(/* webpackChunkName: "login_home_welcome" */ '../components/Roles.vue')
// import Cate from '../components/goods/Cate.vue'
const Cate = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/goods/Cate.vue'
  )
// import Params from '../components/goods/Params.vue'
const Params = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/goods/Params.vue'
  )
// import GoodsList from '../components/goods/List.vue'
const GoodsList = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/goods/List.vue'
  )
// import AddForm from '../components/goods/Add.vue'
const AddForm = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/goods/Add.vue'
  )
// import Order from '../components/order/Order.vue'
const Order = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/order/Order.vue'
  )
// import Report from '../components/report/Report.vue'
const Report = () =>
  import(
    /* webpackChunkName: "login_home_welcome" */ '../components/report/Report.vue'
  )

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params },
      { path: '/goods', component: GoodsList },
      { path: '/goods/add', component: AddForm },
      { path: '/orders', component: Order },
      { path: '/reports', component: Report }
    ]
  }
]

const router = new VueRouter({
  routes
})
// 如果用户没有登录，也就是Sessions Storage中没有token，是不允许/home方式访问后台页面的
router.beforeEach((to, from, next) => {
  // to: 将要访问的
  // form从哪跳转而来的
  // next是一个方法， 表示放行， next()放行， next('/login') 强制跳转
  if (to.path === '/login') return next() // 放行
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login') // 没有登录，强制跳转
  next() // 有登录，放行
})

export default router
